Cap for type-writer key-levers.



R. D. SCOTT.

CAP FOR TYPE WRITER KEY LEVERS.

APPLICATION FILED FEB. q. 1915.

1,148,721; Patented Au 3, 1915.

' UNITED erm ne Parana cannon: A

.RICHARD :o. SCQTT,'OF sr. ALBANs, ynmvronr.

CA]? For. TYPE-WRITER KEY-LEVEBS.

i To all whom it may concern "cap' for typewriter key. levers, and has for' 'itsprimary object'to provide caps for cer- Be it known thatI, RICHARD Dn Soorr, a citizenof the United States, residlng at St. Albans, in the county of Franklin and State of Vermont, have invented certain new and useful Improvements in Caps for Type-Writer Key-Levers, of-which the following is a specification, reference being had to the accompanying drawings. J

[This invention, relates to anlmprove tain of the levers on the keyboard of a type writer having structural characteristics dif-.

feringnfrom the caps on the remaining key levers, whereby the first named key levers maybe readily located by the sense of touch.

The invention has fora more particular objectto provide a cap for typewriter key levers .pa rticularlyde'signed for use by operators .usingthe touch system, said caps being provided with .a'comparatively deep, dished. 'or concave upper face, so as to produce a relatively sharp upstanding annular rim, said cap being applicable. to the.

a key levers of the. various makes of type Writers now in common use.

With the above and other objects i'n'vi'ew, my invention consists in the novel features of construction, combination, and arrange: ment of parts to be hereinafter more fully described,- claimed, and illustrated in the accompanying drawing, in which, Figure 1 is a perspective view, a portion of a'typewriter keyboard showing my improvedcap applied to certain-of the key levers; Fig. 2 is an enlarged -'vertical section;

. usual platen shift keys being, of course,.

and Fig. 3 is an enlarged perspective view of-the cap removed'from the lever.

Referring in detail to the drawing, 5 designates-a keyboard of a typewriti'ng machine, having a bank of type keys 6, the

also provided. Each of the key levers 6 is to readily locate these guide keys by the character on its upper face.

,The present invention is designed for use for the purpose of facilitating the location of certain of the :key'levers by operators using the touch system of typewriting. The key levers which are provided with. the characters A and are generally employed as the guide keys or base fromwhichthe other characters of the keyboard are located, said guide keys being engaged by the "little fingers of the operators hands. It is'fre- 4 Specification of Letterslatent.

I quently necessaryfor the operatorto remove the little fingers from contact with these gui'dekeys, in order that other keys may be operated, and my invention. is devised With a view to enabling the operator. .to. readlly locate these guide keys by the' Patented Aug. 3, 1915. Application filed "ruary e, .1915. j Serial Na 6,531.

so I

portion'S, upon one end of which an outstanding rim or flange 9 'of relativelylarge' diameter, is formed. At the base of this flange, the cap is provided with a horizontalwall 1O constituting one end of the tubular body '8. The upper surface of the cap is dished or concave, as indicatedat 11, and merges into the outstanding rim 9. This cap is preferably constructed of celluloid or other transparent material, and is simply engaged upon the cap 7', provided upon the end of the key'lever 6, so that the guide can the key levers bearing the characters A31.

and and the sharp upstanding rims of these detachable caps and the concave finger engaging faces thereof, in -contradistinction 'to the relatively flat upper faces of the caps on the remaining levers on the keyboard, enables the operator to readily locate the guide keys. By the provision of the dished upper face of the guide cap, the little finger of the hand resting lightly thereon, will not readily slip off'of the key in the manipulation of the remaining key levers by the other fingers. It is also apparent that,

wvhen ,it' is necessary-for the operator to re move the fingers from the guide keys in order to employ the same in the operation of other keys, the guide keys may be readily located and positively distinguished from the remaining keys and liability of errors reduced to a minimum. Speed in operation is also materially increased by meansof my invention, as it is not necessary for the oper- 'that, if desired, the improved cap construction may constitute a permanent'feature of the typewriter keyboard, and he provided in the manufacture of the machine instead of being separately sold to be applled to or removed from the key -lever. It is, there-- fore, to be borne in mind thatl do not Wish to be limited to any particular material or to .the specific form or shape of the -c'ap,.as

I such structural features maybe variously modified in order to render the device zidaptable to anyone of the sever-eleven knownmakes of typewriters'now in general use.

Having thus fully described my inventlon,

what I desire to claim and secure by Letters 3 A detachable ca'p'for the keylever of a typewriting-machine Wholly constructed of transparenflmaterial and having, a rigid copies of this patent may be obtained for five cents each, by addres ii1gt1ie' .oni

I WashingtomDfC. d

" keylev'er, said tubular body bei'ngi clo sed 'at merging into the upper surface. ofxthe 'en tubular body portion of uniform diameter throughout its 'length and adapted to. receive and entirely contain the same'on the-. 20

one'end by .a horizontal Wall having an out- Wardly and upwardly curved flange; formed.- thereon, the upper surface of the flange 25 Wall and forming in conjunction therewith a concave finger engaging surface. In .testimony'whereof I hereunto afiix'my v signature in the presence: of two itnesses. RICHARD; D; SCOTT"- Witnesse's u;

. J. A. Co 'EMA M. FQJAQKS' 

